# How to Deploy a React App on Heroku in 2026
> Learn how to deploy a React app on Heroku in 2026. Covers Procfile, static server setup, common errors, and a faster no-config alternative with Kuberns.
- **Author**: sofia-castellano
- **Published**: 2026-05-12
- **Modified**: 2026-05-12
- **Category**: Deployment Guides
- **URL**: https://kuberns.com/blogs/how-to-deploy-react-app-on-heroku/
---
You can deploy a React app on Heroku in 2026, but it takes more setup than most tutorials suggest. React is a static frontend: it compiles down to HTML, CSS, and JavaScript files. Heroku runs server-based applications, so you need to add a lightweight static file server, write a Procfile, and configure your build correctly before anything works.
This guide walks through every step clearly. If you want to skip the manual config entirely, the last section covers how to deploy React in under five minutes using [Kuberns](https://kuberns.com), where the agentic AI handles everything automatically.
## Prerequisites
Before you start, make sure you have the following ready:
- A React app built with Vite or Create React App
- Node.js installed locally
- Git installed and your project in a repository
- Heroku CLI installed and a Heroku account (paid plan required, minimum $5/month)
> Heroku removed its free tier in 2022. Before committing to a plan, read the [full Heroku pricing breakdown](https://kuberns.com/blogs/heroku-pricing-explained/) to understand what dynos, add-ons, and scaling actually cost in 2026.
## How to Deploy a React App on Heroku
### Step 1: Add a Static File Server
Heroku does not serve static files on its own. React's production build outputs a `build/` folder (or `dist/` in Vite), and you need a small server to serve those files over HTTP.
The standard approach is to install the `serve` package as a production dependency and configure your `package.json` start script to run it pointing at your build output folder.
This step alone trips up a lot of developers because most React tutorials assume Vercel or Netlify, where static files are handled automatically. On Heroku, you are responsible for this yourself.
### Step 2: Create a Procfile
A Procfile is a plain text file at the root of your project that tells Heroku what command to run when the dyno starts. For a React app, it needs to execute your static server.
There is no file extension on the Procfile. The name must be exactly `Procfile` with a capital P. Getting the casing wrong means Heroku silently ignores it and your app fails to start.
### Step 3: Set the Node.js Version
By default Heroku uses an older Node.js version that may not match your local environment. You need to explicitly declare your Node.js version in `package.json` under the `engines` field.
If this does not match what your app was built with locally, you will see dependency resolution errors or build failures that are difficult to debug.
### Step 4: Create the Heroku App and Deploy
Log in to the Heroku CLI, create a new app, and push your code via Git. Heroku detects Node.js automatically from `package.json` and runs your build script during the push.
Once the push succeeds you need to manually scale your web dyno to 1. Heroku does not do this automatically on a new app, and skipping it means your app is deployed but nothing is running to serve traffic.
After scaling, your app is live at `https://your-app-name.herokuapp.com`.
> If you want GitHub pushes to trigger automatic deploys, set up [Heroku GitHub integration](https://kuberns.com/blogs/heroku-github-integration/) from the Deploy tab in your Heroku dashboard.
## Why React on Heroku Breaks (And Where It Sends You)
Even with everything configured correctly, React deployments on Heroku fail in predictable ways. The frustrating part is that most of these errors look the same on the surface and have different root causes.
**Blank page after deploy.** Your dyno is running but serving the wrong folder, or the static server is not configured to handle client-side routing. React Router apps need the server to redirect all routes back to `index.html`, otherwise every route except the homepage returns a 404. Fixing this requires changing your server configuration and redeploying.
**Build not triggering on push.** If your `build` script is missing from `package.json` or named differently than what Heroku expects, the production build never runs. Heroku pushes successfully but your `build/` folder is empty or stale.
**Environment variables not loading.** React requires environment variables that need to be available in the browser to be prefixed with `REACT_APP_` (or `VITE_` in Vite). These are baked into the JavaScript bundle at build time, not injected at runtime. If you set them in Heroku after the push, they will not appear until you trigger a full rebuild by pushing again.
**Dyno sleeping.** On the Eco plan ($5/month), your dyno sleeps after 30 minutes of inactivity. The next visitor experiences a cold start of 5 to 30 seconds while the dyno wakes up. Fixing this means upgrading to the Basic dyno at $7/month, which adds to your monthly bill.
Each of these problems has a fix, but each fix adds more configuration, more time, and more things to maintain. If you are hitting multiple errors in sequence, that is usually the point where switching platforms makes more sense than continuing to debug.
> At this point most developers ask why deployment has to be this involved. [What one-click deployment actually does](https://kuberns.com/blogs/what-does-one-click-deployment-do/) explains what modern AI-native platforms handle automatically and why the gap between Heroku and newer platforms has widened significantly in 2026.
## Deploy React on Kuberns with Agentic AI Now
[Kuberns](https://kuberns.com) is an agentic AI cloud deployment platform. Connect your GitHub repository and the AI agent reads your codebase, identifies that it is a React application, determines whether you are using Vite or Create React App, configures the build command and output directory automatically, provisions the infrastructure, and deploys your app to a live HTTPS URL.
You do not write a Procfile. You do not configure a static file server. You do not set a Node.js version manually. You do not scale dynos. The agentic AI makes those decisions from your code and handles them without input from you.
Here is what the process looks like:
**Connect your repository.** Sign in to Kuberns, connect your GitHub account, and select your React repository. The AI agent scans your project immediately.
**AI detects your stack.** Kuberns identifies your framework, build tool, and output directory automatically. For a Vite app it sets `npm run build` and serves from `dist/`. For Create React App it does the same from `build/`. No configuration required from you.
**One click to deploy.** Click deploy. Kuberns runs your build, provisions a container, sets up HTTPS, and gives you a live URL. The entire process takes under five minutes from a fresh repository.
**Every push deploys automatically.** After the initial deploy, every push to your connected branch triggers a new build and deployment automatically. There is no CLI command to run, no manual step, and no dyno scaling to manage.
> Teams deploying React and other frontend frameworks are increasingly choosing agentic platforms over traditional PaaS. [Best AI solutions for automating code deployments and CI/CD](https://kuberns.com/blogs/best-ai-solutions-for-automating-code-deployments-and-cicd/) covers why agentic deployment has become the default for teams that want to ship without managing infrastructure.
[Deploy your React app on Kuberns free](https://dashboard.kuberns.com) and have it live in under five minutes.
## FAQ
**Can I deploy a React app on Heroku for free in 2026?**
No. Heroku removed its free tier in November 2022. The minimum cost in 2026 is $5 per month for an Eco dyno. Eco dynos also sleep after 30 minutes of inactivity, which causes slow cold starts. The Basic dyno at $7 per month stays awake but costs more.
**Does Heroku support React in 2026?**
Yes, but React is a static frontend and Heroku runs server-based apps. You need to add a lightweight static file server like the serve package, create a Procfile, and configure your build script correctly before Heroku can host your React app.
**Why does my React app show a blank page on Heroku?**
A blank page usually means Heroku is not serving your production build correctly. The most common cause is a missing or misconfigured static server. Your Procfile needs to run a server that serves the `build/` output folder, not the React development server.
**What is the easiest way to deploy a React app without manual config?**
Kuberns is the easiest option. Connect your GitHub repository, and the agentic AI detects your React app automatically, runs the build, and deploys it to a live HTTPS URL in under five minutes. No Procfile, no static server setup, no CLI commands required.
---
- [More Deployment Guides articles](https://kuberns.com/blogs/category/deployment-guides/1/)
- [All articles](https://kuberns.com/blogs/)